Reduce the requirement for saving previousLocation

third_party/WebKit/LayoutTests/platform/win/paint/invalidation/bugzilla-5699-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow P",
@@ skipping 17 matching lines @@
         },
         {
           "object": "LayoutText #text",
           "rect": [8, 145, 4, 17],
           "reason": "style change"
         },
         {
           "object": "LayoutText #text",
           "rect": [8, 130, 4, 17],
           "reason": "style change"
-        },
-        {
-          "object": "LayoutBR BR",
-          "rect": [43, 178, 1, 17],
-          "reason": "forced by layout"
-        },
-        {
-          "object": "LayoutBR BR",
-          "rect": [43, 148, 1, 17],
-          "reason": "forced by layout"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow P",
       "reason": "forced by layout"
     },
     {
@@ skipping 36 matching lines @@
       "object": "LayoutBR BR",
       "reason": "forced by layout"
     },
     {
       "object": "InlineTextBox '\n'",
       "reason": "forced by layout"
     }
   ]
 }